mirror of
https://github.com/dborth/fceugx.git
synced 2025-01-10 07:39:39 +01:00
74 lines
1.9 KiB
C++
74 lines
1.9 KiB
C++
/* FCE Ultra - NES/Famicom Emulator
|
|
*
|
|
* Copyright notice for this file:
|
|
* Copyright (C) 2006 CaH4e3
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#include "mapinc.h"
|
|
|
|
static uint8 bank, base, lock, mirr, mode;
|
|
static SFORMAT StateRegs[] =
|
|
{
|
|
{ &bank, 1, "BANK" },
|
|
{ &base, 1, "BASE" },
|
|
{ &lock, 1, "LOCK" },
|
|
{ &mirr, 1, "MIRR" },
|
|
{ &mode, 1, "MODE" },
|
|
{ 0 }
|
|
};
|
|
|
|
static void Sync(void) {
|
|
setchr8(0);
|
|
setprg16(0x8000, base | bank);
|
|
setprg16(0xC000, base | (mode ? bank : 7));
|
|
setmirror(mirr);
|
|
}
|
|
|
|
static DECLFW(BMCT262Write) {
|
|
if (!lock) {
|
|
base = ((A & 0x60) >> 2) | ((A & 0x100) >> 3);
|
|
mode = A & 0x80;
|
|
mirr = ((A & 2) >> 1) ^ 1;
|
|
lock = (A & 0x2000) >> 13;
|
|
}
|
|
bank = V & 7;
|
|
Sync();
|
|
}
|
|
|
|
static void BMCT262Power(void) {
|
|
lock = bank = base = mode = 0;
|
|
Sync();
|
|
SetWriteHandler(0x8000, 0xFFFF, BMCT262Write);
|
|
SetReadHandler(0x8000, 0xFFFF, CartBR);
|
|
}
|
|
|
|
static void BMCT262Reset(void) {
|
|
lock = bank = base = mode = 0;
|
|
Sync();
|
|
}
|
|
|
|
static void BMCT262Restore(int version) {
|
|
Sync();
|
|
}
|
|
|
|
void BMCT262_Init(CartInfo *info) {
|
|
info->Power = BMCT262Power;
|
|
info->Reset = BMCT262Reset;
|
|
GameStateRestore = BMCT262Restore;
|
|
AddExState(&StateRegs, ~0, 0, 0);
|
|
}
|